Air conditioning apparatus



Nov. 6, 193"? ,5. F. FISHER AIR CONDITIONING APPARATUS Filed Aug. 23, 1929 C:- l J Patented Nov. 6, 1934 UNITED STATES PATENT OFFICE 4 Claims.

The present invention relates to apparatus for heating, washing and humidifying air for warming homes, omces and public buildings and for use in processes requiring conditioned air.

One of the principal objects of my invention is to provide in one compact apparatus means for washing, heating and humidifying air, the washing and humidifying operations being separate from the heating operation, and to discharge the washed and humidified air into the room separate from the heated air but in correlation with each other as hereinafter explained.

The accompanying drawing shows diagrammatical representations of a preferred embodiment of my improved air conditioning unit. Figure 1 is a vertical cross section of the apparatus, and Figure 2 is a front elevation thereof.

The partition 7 with its upper and lower curved ends in combination with the front wall of the apparatus forms a verticalstack A within the cabinet 8. This stack has an inlet 5 at the bottom and an outlet 4 at the top. Within the stack A and above the inlet 5 are positioned coils or other heating elements 9 which heat the incoming air as it passes up the stack A and through the outlet 4. Back of stack A is stack B with an inlet 6 directly below inlet 5 and an outlet 3 directly above hot air outlet 4. At the top of stack B and in front of outlet 3 is fan 1 which draws air through inlet 6 up the stack 18 and forces it out through outlet 3. At top of stack 13 is positioned water spray nozzle 2 which sprays the air as it passes up through stack B impelled by the Ian 1. The surplus water falls into chamber 10 which forms the bottom of cabinet 8.

The operation of the apparatus is as follows: Heat applied to the coils or element 9 causes the air in stack A to be heated. The air rises and cold air flows in through inlet 5 to take its place. The heated air issues from top of stack A through outlet 4. 4

With further reference to Fig. 1, the action of the fan is as follows: The cold air enters the stack B through the cold air register 6, because of the suction induced by the fan 1. At the same time cold air enters the stack A through the register 5, induced partly by draft produced by the heating coils 9 and partly by being sucked in with the air current entering the register 6. The air entering the register 5 moves in above the layer of air entering the register 6, and because the air entering the register 6 is traveling at a higher velocity it has a decided propelling or pulling action on the air which enters the register 5.

This same action takes place, although in a reverse manner, when the air leaves the registers 3 and 4. The fan 1 forces the air out through the register 3, and the air flowing through the register 4 is propelled by the draft set up in the stack A and by the infiowing pull of the air into the register 5. This air is further employed by being pulled along by the blanket of cold air issuing out of the register 3, the layer of hot air being disposed beneath the layer of cold air and being drawn along with it. This pull by the cold air on the hot air is quite pronounced, because of the higher velocity with which the cold air issues from the register 3.

It is evident that while the fan 1 has no direct connection with the stack A, yet it has a decided influence on the circulation of hot air through the stack A.

Thus circulation is kept up as long as heat is applied to coils 9. At the same time fan 1 is pulling air through inlet 6 up the stack B through the water spray and discharges it through the outlet 3 directly above hot air outlet 4.

Having described my invention, I claim:

1. An air conditioning apparatus comprising a bifurcated stack, one leg of said stack containing heating coils over which air to be heated is passed, the other leg of said stack having a water spray nozzle, and a fan arranged to draw cold air up through the water spray, said fan arranged so as to discharge this cold air in a horizontal plane above the hot air issuing from hot air leg of said bifurcated stack and being adapted to induce increased movement of air through the leg of the stack which contains the heating coils.

2. An air conditioning apparatus comprising a casing having juxtaposed passageways therein, the outlets of said passageways being superposed, an air heater in the passageway having the lower outlet, means for humidifying the air which moves through the passageway having the higher outlet, and means distinct from the structure of the casing for maintaining the velocity of the air in the latter passageway greater than in the former, the last mentioned means serving also to increase the velocity of the air passing through the passageway having the lower outlet.

3. An air conditioning apparatus comprising a casing having juxtaposed passageways therein, the outlets of said passageways being superposed, an air moiing device in the passageway having the higher outlet distinct from the structure of the casing, and a heater for the air which moves through the passageway having the lower outlet, said air moving device serving also to increase diateiy above the hot air stream, which latter stream is in a dry condition, and maintaining the flow of the moist air stream at a higher veiocity than the flow of the hot air stream by increasing its speed or movement throughout its entire length. a

\ ERNEST F. FISHER. 

